Lightest Visible-Sector Supersymmetric Particle is Likely to be Unstable

Scalar Top Quark as the Next-to-Lightest Supersymmetric Particle

We study phenomenologically the scenario in which the scalar top quark is lighter than any other standard supersymmetric partner and also lighter than the top quark, so that it decays to the gravitino via e t ! Wb e G. In this case, scalar top quark events would seem to be very di cult to separate from top quark pair production. However, we show that, even at a hadron collider, it is possible t...

A HEAVY GLUINO AS THE LIGHTEST SUPERSYMMETRIC PARTICLE Howard

We consider the possibility that the lightest supersymmetric particle is a heavy gluino. After discussing models in which this is the case, we demonstrate that the g̃-LSP could evade cosmological and other constraints by virtue of having a very small relic density. We then consider how neutral and charged hadrons containing a gluino will behave in a detector, demonstrating that there is generall...

A Heavy Gluino as the Lightest Supersymmetric Particle

We consider the possibility that the lightest supersymmetric particle is a heavy gluino. After discussing models in which this is the case, we demonstrate that the g̃-LSP could evade cosmological and other constraints by virtue of having a very small relic density. We then consider how neutral and charged hadrons containing a gluino will behave in a detector, demonstrating that there is generall...

Stop as a next-to-lightest supersymmetric particle in constrained MSSM

What Is the Upper Limit on the Lightest Supersymmetric

In this talk the question of what is the upper bound on the lightest supersymmetric Higgs mass, mh is addressed. This question is relevant since experimental lower bounds on mh might implement, in the near future, exclusion of supersymmetry. By imposing (perturbative) unification of the gauge couplings at some high scale > ∼ 10 GeV, we have found that for a top-quark mass Mt = 175 GeV, and depe...